4. Determine the theoretical (exact) and quick estimate bearing defect (rotational) frequencies for bearing NTN 7315,...
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4. Determine the theoretical ("exact") and quick estimate bearing defect (rotational) frequencies for bearing NTN 7315, assuming it has 8 balls with a ball diameter of 0.975 in. (Quick estimates: FTF = 0.4xRPM, BSF = 2.6xRPM, BPFO = 4.1xRPM, BPFI = 5.9xRPM or 0.6xNxRPM). The bearings are used with an electric motor operating at 1750 RPM. Bearing specifications are on the back. NTN SERIES 73-73B 30 Contact angle 73 Bearing No. 73 7300 01 02 7303 04 05 7306 07 08 7307 10 11 7312 13 14 7315 16 17 7318 19 20 7321 22 24 7326 28 30 7332 34 36 7338 40 SINGLE ROW ANGULAR CONTACT BALL BEARINGS 73B 7300B 018 028 7303B 04B 058 73068 07B 088 7309B 108 118 73128 13B 14B 73156 168 178 73188 198 208 73218 228 24B 73268 280 30B 73328 348 36B 73388 40B mm 10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200 d in. 0,3937 0,4724 0.5906 0.6693 0,7874 0.9843 1,1811 1,3780 1,5748 1,7717 1,9685 2, 1654 2.3622 2,5591 2.7559 2,9528 3,1496 3,3465 3,5433 3,7402 3.9370 4, 1339 4,3307 4.7244 5,1181 5,5118 5.9055 6,2992 6,6929 7,0866 7.4803 7.8740 mm 35 37 42 47 52 62 72 80 90 100 110 120 130 140 150 160 170 180 190 200 215 225 240 260 280 300 320 340 360 380 400 420 D in. 1,3780 1.4567 1.6535 1.9504 2,0472 2.4-199 2.8346 3.1496 3.5433 3,9370 4,3307 4,7244 5,1181 5,5118 5.9055 6,2992 6,6729 7,0866 7.4903 7,0740 8,4546 8,83 9.4.98 10, 2362 11, C236 11,0110 12,5984 13,2958 14,1732 14,9606 15.7480 16,5354 mm 11 12 123 13 14 15 17 457 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 50 55 58 62 65 68 72 75 78 80 B in. 0.4331 0.4724 0,5118 0,5512 0,5906 0.4593 0,7480 0.8268 0.9055 0,9843 1,0630 1,1417 1,2205 1,2992 1,3780 1,4557 1,5354 1,6142 1,6^29 1.7717 1,2504 1.9291 1.9685 2,1654 2,2935 2,4/09 2,5591 2,6772 2,8346 2,9528 YE 3,0709 3,1496 mm 1 1.5 1.5 1.5 2 2 2.5 2.5 2.5 3 3 3.5 3.5 3.5 3.5 3.5 555 6 in. 0,039 0.059 0.059 0,059 0,079 0,079 0.079 0,098 0.098 0,098 0.118 0.118 0.138 0.138 0,138 0.138 0,138 0,157 0,157 0,157 0,157 0.157 0, 157 0,157 0.197 0.197 0, 197 0, 197 0, 197 0, 197 0,236 0.236 mm 0.5 0.8 0.8 0.8 1 1 1 1.2 1.2 1.2 1.5 1.5 2 2 222 222 222 222 2.5 2,5 2.5 2.5 2.5 2.5 3 4. Determine the theoretical ("exact") and quick estimate bearing defect (rotational) frequencies for bearing NTN 7315, assuming it has 8 balls with a ball diameter of 0.975 in. (Quick estimates: FTF = 0.4xRPM, BSF = 2.6xRPM, BPFO = 4.1xRPM, BPFI = 5.9xRPM or 0.6xNxRPM). The bearings are used with an electric motor operating at 1750 RPM. Bearing specifications are on the back. NTN SERIES 73-73B 30 Contact angle 73 Bearing No. 73 7300 01 02 7303 04 05 7306 07 08 7307 10 11 7312 13 14 7315 16 17 7318 19 20 7321 22 24 7326 28 30 7332 34 36 7338 40 SINGLE ROW ANGULAR CONTACT BALL BEARINGS 73B 7300B 018 028 7303B 04B 058 73068 07B 088 7309B 108 118 73128 13B 14B 73156 168 178 73188 198 208 73218 228 24B 73268 280 30B 73328 348 36B 73388 40B mm 10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200 d in. 0,3937 0,4724 0.5906 0.6693 0,7874 0.9843 1,1811 1,3780 1,5748 1,7717 1,9685 2, 1654 2.3622 2,5591 2.7559 2,9528 3,1496 3,3465 3,5433 3,7402 3.9370 4, 1339 4,3307 4.7244 5,1181 5,5118 5.9055 6,2992 6,6929 7,0866 7.4803 7.8740 mm 35 37 42 47 52 62 72 80 90 100 110 120 130 140 150 160 170 180 190 200 215 225 240 260 280 300 320 340 360 380 400 420 D in. 1,3780 1.4567 1.6535 1.9504 2,0472 2.4-199 2.8346 3.1496 3.5433 3,9370 4,3307 4,7244 5,1181 5,5118 5.9055 6,2992 6,6729 7,0866 7.4903 7,0740 8,4546 8,83 9.4.98 10, 2362 11, C236 11,0110 12,5984 13,2958 14,1732 14,9606 15.7480 16,5354 mm 11 12 123 13 14 15 17 457 19 21 23 25 27 29 31 33 35 37 39 41 43 45 47 49 50 55 58 62 65 68 72 75 78 80 B in. 0.4331 0.4724 0,5118 0,5512 0,5906 0.4593 0,7480 0.8268 0.9055 0,9843 1,0630 1,1417 1,2205 1,2992 1,3780 1,4557 1,5354 1,6142 1,6^29 1.7717 1,2504 1.9291 1.9685 2,1654 2,2935 2,4/09 2,5591 2,6772 2,8346 2,9528 YE 3,0709 3,1496 mm 1 1.5 1.5 1.5 2 2 2.5 2.5 2.5 3 3 3.5 3.5 3.5 3.5 3.5 555 6 in. 0,039 0.059 0.059 0,059 0,079 0,079 0.079 0,098 0.098 0,098 0.118 0.118 0.138 0.138 0,138 0.138 0,138 0,157 0,157 0,157 0,157 0.157 0, 157 0,157 0.197 0.197 0, 197 0, 197 0, 197 0, 197 0,236 0.236 mm 0.5 0.8 0.8 0.8 1 1 1 1.2 1.2 1.2 1.5 1.5 2 2 222 222 222 222 2.5 2,5 2.5 2.5 2.5 2.5 3
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